💡 Standardization of block types (names)

Currently there's no standart for block types. This causes problems with automatic parsing. I created a library to parse Editor.js output and by default, library tries to resolve block type by class name of the block. For example;

We have a block named `ImageBlock`, library gets the class name and converts into `image`. But what is Editor.js expected is `Image`. I know that type provided by plugin, but Editor.js should try to standardize it. It's not nice to declare block type every single time. If you want to look how library tries to resolve the type, [please click](https://github.com/bumpcore/editor.php/blob/4a35777f6e80c2ca681e8578d5e316c489cc044b/src/Parser.php#L77).

Probably I should remove lowering the string, and certainly such a change could cause lots of problems but at next big update, I would like to see that.